Verfahren zur Herstellung von Baumaterialplatten

摘要

PCT No. PCT/JP93/00008 Sec. 371 Date Aug. 28, 1995 Sec. 102(e) Date Aug. 28, 1995 PCT Filed Jan. 7, 1993 PCT Pub. No. WO94/15767 PCT Pub. Date Jul. 21, 1994The present invention provides a method of treating waste magnetic tapes characterized in that waste magnetic tapes such as video tapes and cassette tapes are cut or crushed to a length of 1 to 50 mm, and heated at a temperature of 100 DEG to 200 DEG C. so that they are contracted in the form of curl, and a method of manufacturing building material boards characterized in that waste magnetic tapes such as video tapes and cassette tapes are cut or crushed to a proper size, heated, and then, supplied with a binder and molded under pressure.